Inorganic Chemicals Industry >
Study on preparation of flower-like WSe2 nanomaterial by solvothermal method and its gas sensing properties
Received date: 2020-07-16
Online published: 2021-05-12
Using N,N-dimethylformamide as dispersant as well as sodium selenite and sodium tungstate as raw materials,the flower-like WSe2 nanomaterial stacked by ultrathin two-dimensional layered nanosheets were prepared by solvothermal met-hod and its gas sensing properties were also studied.The structure of as-synthesized material was characterized by X-ray po-wder diffraction（XRD）,scanning electron microscopy（SEM） and transmission electron microscopy（TEM）.The results indi-cated that the synthesized flower-like WSe2 was hexagonal phase and had the high selectivity and ultrafast response/recovery rate to triethylamine among the gas sensing properties to amine gases including triethylamine,ammonia,trimethylamine,ani-line and formamide.Under the optimum operating temperature of 220 ℃,the sensitivity of the sensor to triethylamine with vol-ume fraction of 50×10 -6 reaches 20.1,the response time and recovery time are 6 s and 3 s respectively,and the minimum de-tection limit is 0.3×10-6.The gas sensing mechanism for the WSe2 nanomaterial was also discussed.The obtained WSe2 had po-tential applications in the gas sensing field.
Key words： WSe2; flower-like structure; solvothermal method; gas sensing
Yanghai Gui , Xinghui Wang , Kuan Tian , Linlin Qian . Study on preparation of flower-like WSe2 nanomaterial by solvothermal method and its gas sensing properties[J]. Inorganic Chemicals Industry, 2021 , 53(5) : 47 -50 . DOI: 10.11962/1006-4990.2020-0337
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